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/*
* Copyright (c) 2001-2019 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifndef STRACE_MACROS_H
# define STRACE_MACROS_H
# include <stdbool.h>
# include <stddef.h>
# include <sys/types.h>
# include "gcc_compat.h"
# define ARRAY_SIZE(a_) (sizeof(a_) / sizeof((a_)[0]) + MUST_BE_ARRAY(a_))
# define ARRSZ_PAIR(a_) a_, ARRAY_SIZE(a_)
# define STRINGIFY(...) #__VA_ARGS__
# define STRINGIFY_VAL(...) STRINGIFY(__VA_ARGS__)
# ifndef MAX
# define MAX(a, b) (((a) > (b)) ? (a) : (b))
# endif
# ifndef MIN
# define MIN(a, b) (((a) < (b)) ? (a) : (b))
# endif
# define CLAMP(val, min, max) MIN(MAX(min, val), max)
# ifndef ROUNDUP_DIV
# define ROUNDUP_DIV(val_, div_) (((val_) + (div_) - 1) / (div_))
# endif
# ifndef ROUNDUP
# define ROUNDUP(val_, div_) (ROUNDUP_DIV((val_), (div_)) * (div_))
# endif
# define sizeof_field(type_, member_) (sizeof(((type_ *)0)->member_))
# ifndef offsetofend
# define offsetofend(type_, member_) \
(offsetof(type_, member_) + sizeof_field(type_, member_))
# endif
# ifndef cast_ptr
# define cast_ptr(type_, var_) \
((type_) (uintptr_t) (const volatile void *) (var_))
# endif
# ifndef containerof
/**
* Return a pointer to a structure that contains the provided variable.
*
* @param ptr_ Pointer to data that is a field of the container structure.
* @param struct_ Type of the container structure.
* @param member_ Name of the member field.
* @return Pointer to the container structure.
*/
# define containerof(ptr_, struct_, member_) \
cast_ptr(struct_ *, \
(const volatile char *) (ptr_) - offsetof(struct_, member_))
# endif
static inline bool
is_filled(const char *ptr, char fill, size_t size)
{
while (size--)
if (*ptr++ != fill)
return false;
return true;
}
# define IS_ARRAY_ZERO(arr_) \
is_filled((const char *) (arr_), 0, sizeof(arr_) + MUST_BE_ARRAY(arr_))
# ifndef BIT
# define BIT(x_) (1U << (x_))
# endif
# define FLAG(name_) name_ = BIT(name_##_BIT)
#endif /* !STRACE_MACROS_H */
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